Common injection device

Abstract

A common injection device is assembled with an injection needle containing a drug, and has a needle bushing, a drug-information providing portion disposed on the needle bushing, and an injection propulsion mechanism detachably connected to the needle bushing. The needle bushing has a connecting portion with multiple engaging hooks, a bushing base, and a middle hole. The needle bushing is assembled with the injection needle, and the drug-information providing portion provides readable drug information of the drug. The injection propulsion mechanism is used to connect the needle bushing, and the injection action is performed according to the drug information to ensure the safety of injection. The injection propulsion mechanism is of a general type and is reusable, and it is not necessary to make a specific or dedicated injection device according to the injection needles equipped with different drugs, thereby reducing waste and reducing cost.

What is claimed is: 
     
       1. A common injection device, adapted to assemble with an injection needle containing a drug, characterized in that the common injection device includes:
 a needle bushing adapted to assemble with the injection needle and having
 a connecting portion; 
 a bushing base formed on a front end of the connecting portion and having two operating portions respectively formed on and protruded outwardly from two opposite sides thereof; and 
 a middle hole axially formed through the bushing base and the connecting portion, 
 wherein the connecting portion has multiple engaging hooks formed on and extended into the middle hole, the middle hole enables a tube of the injection needle to pass through, and a rear end of the tube is fixed in the middle hole by the multiple engaging hooks; 
 
 a drug-information providing portion disposed on the needle bushing and being capable of providing readable information corresponding to the drug in the injection needle; and 
 an injection propulsion mechanism detachably connected to the connecting portion of the needle bushing and being capable of providing a pushing force for the injection needle to inject the drug. 
 
     
     
       2. The common injection device as claimed in  claim 1 , characterized in that the drug-information providing portion is formed on an outer surface of the needle bushing and provides visually readable information corresponding to the drug. 
     
     
       3. The common injection device as claimed in  claim 2 , characterized in that the injection propulsion mechanism is a manual injection propulsion mechanism and has a housing and a screw push rod set, the housing is detachably connected to the connecting portion of the needled bushing, and the screw push rod set is disposed in the housing and inserted into the injection needle via the needle bushing to provide the pushing force to the injection needle. 
     
     
       4. The common injection device as claimed in  claim 2 , characterized in that the injection propulsion mechanism is an electric injection propulsion mechanism and comprises:
 a casing having a front end detachably connected to the connecting portion of the needle bushing; 
 a screw push rod set disposed in the casing and driven to extend out of the front end of the casing to insert into the injection needle to provide the pushing force; 
 an electric motor disposed in the casing and connected to the screw push rod set; and 
 a control assembly disposed in the casing and having a control circuit board with a microprocessor and a switch element, the control circuit board electrically connected to the electric motor to determine an operation mode of the electric motor, and the switch element disposed out of the casing to control switching on or off the control circuit board. 
 
     
     
       5. The common injection device as claimed in  claim 1 , characterized in that the drug-information providing portion is disposed in the needle bushing, provides information corresponding to the drug being read electronically, and is connected to an electronic reading module disposed in the injection propulsion mechanism. 
     
     
       6. The common injection device as claimed in  claim 5 , characterized in that the injection propulsion mechanism is an electric injection propulsion mechanism and comprises:
 a casing having a front end detachably connected to the connecting portion of the needle bushing; 
 a screw push rod set disposed in the casing and driven to extend out of the front end of the casing to insert into the injection needle to provide the pushing force; 
 an electric motor disposed in the casing and connected to the screw push rod set; and 
 a control assembly disposed in the casing and having a control circuit board with a microprocessor and a switch element, the control circuit board electrically connected to the electric motor to determine an operation mode of the electric motor, and the switch element disposed out of the casing to control switching on or off the control circuit board; 
 wherein the electronic reading module is an angular displacement analog module and has an angular displacement drive formed on an outer surface of the connecting portion of the needle bushing and assembled and rotated with the connecting portion of the needle bushing in the casing of the injection propulsion mechanism, the angular displacement drive is set according to the information corresponding to the drug contained in the injection needle to set a contact transmission section of a specific rotation angle, the electronic reading module is disposed in the casing of the injection propulsion mechanism and has a driven wheel and an angular displacement detection element, the driven wheel is rotated by the angular displacement drive to generate an angular displacement of a specific angle, the angular displacement detection element is connected to the driven wheel and is electrically connected to the control circuit board of the control assembly, and the angular displacement detection element outputs a corresponding angular displacement analog information to the control circuit board according to the angular displacement of the driven wheel driven to rotate, and the microprocessor of the control circuit board reads the corresponding angular displacement analog information to determine the kind of the drug and to decide to execute a specific injection propelling action corresponding to the drug. 
 
     
     
       7. The common injection device as claimed in  claim 6 , characterized in that the angular displacement drive has a structure with at least one turning-angle limiting tooth, the angular displacement drive sets the number of the turning-angle limiting teeth according to the information corresponding to the drug contained in the injection needle, the driven wheel of the electronic reading module is a gear that engages the turning-angle limiting teeth, the angular displacement detection element is selected from a potentiometer or a variable resistor and is electrically connected to the control circuit board of the control assembly, a specific rotation angle range is provided as the contact transmission section by the turning-angle limiting teeth, an area on a periphery of the angular displacement drive is a non-contact transmission section, and the angular displacement detection element outputs a corresponding voltage signal to the control circuit board according to the angular displacement of the driven wheel driven to rotate. 
     
     
       8. The common injection device as claimed in  claim 6 , characterized in that the contact transmission section of the angular displacement drive has frictional resistance, a specific length is set according to the information corresponding to the drug contained in the injection needle, the driven wheel of the electronic reading module is a friction wheel that is frictionally driven by the angular displacement drive, the angular displacement detection element is selected from a potentiometer or a variable resistor and is electrically connected to the control circuit board of the control assembly, and the angular displacement detection element outputs a corresponding voltage signal to the control circuit board according to the angular displacement of the driven wheel driven to rotate. 
     
     
       9. The common injection device as claimed in  claim 5 , characterized in that the injection propulsion mechanism is an electric injection propulsion mechanism and comprises:
 a casing having a front end detachably connected to the connecting portion of the needle bushing; 
 a screw push rod set disposed in the casing and driven to extend out of the front end of the casing to insert into the injection needle to provide the pushing force; 
 an electric motor disposed in the casing and connected to the screw push rod set; and 
 a control assembly disposed in the casing and having a control circuit board with a microprocessor and a switch element, the control circuit board electrically connected to the electric motor to determine an operation mode of the electric motor, and the switch element disposed out of the casing to control switching on or off the control circuit board; 
 wherein the electronic reading module is an angular displacement analog module and has a conductive coating or a conductive sticker formed on a specific section of the outer surface of the connecting portion of the needle bushing, the electronic reading module has an angular displacement detection element, the angular displacement detection element has a coil and is electrically connected to the control circuit board of the control assembly, the angular displacement detection element detects a magnetic flux change according to a distance change of the conductive coating or the conductive sticker due to a rotational angular displacement and outputs a corresponding magnetic flux signal to the control circuit board, and the microprocessor of the control circuit board reads the corresponding magnetic flux signal to determine the kind of the drug and to decide to execute a specific injection propelling action corresponding to the drug. 
 
     
     
       10. The common injection device as claimed in  claim 5 , characterized in that the injection propulsion mechanism is an electric injection propulsion mechanism and comprises:
 a casing having a front end detachably connected to the connecting portion of the needle bushing; 
 a screw push rod set disposed in the casing and driven to extend out of the front end of the casing to insert into the injection needle to provide the pushing force; 
 an electric motor disposed in the casing and connected to the screw push rod set; and 
 a control assembly disposed in the casing and having a control circuit board with a microprocessor and a switch element, the control circuit board electrically connected to the electric motor to determine an operation mode of the electric motor, and the switch element disposed out of the casing to control switching on or off the control circuit board; 
 wherein the drug-information providing portion provides photoelectric coding digital information and has a light sensing section whose specific light transmission area is set according to the information corresponding to the drug contained in the injection needle, the electronic reading module is a photoelectric coding module, is disposed in the casing of the injection propulsion mechanism and has a light source and a light detection element, the light source and the light detection element are located on two opposite sides of the light sensing section and are electrically connected to the control circuit board of the control assembly, the light detection element senses the transmittance of the light emitted by the light source through the light sensing section and outputs a corresponding voltage signal to the control circuit board, and the microprocessor of the control circuit board determines the kind of drug and decides to perform a specific injection propulsion action corresponding to the drug. 
 
     
     
       11. The common injection device as claimed in  claim 5 , characterized in that the injection propulsion mechanism is an electric injection propulsion mechanism and comprises:
 a casing having a front end detachably connected to the connecting portion of the needle bushing; 
 a screw push rod set disposed in the casing and driven to extend out of the front end of the casing to insert into the injection needle to provide the pushing force; 
 an electric motor disposed in the casing and connected to the screw push rod set; and 
 a control assembly disposed in the casing and having a control circuit board with a microprocessor and a switch element, the control circuit board electrically connected to the electric motor to determine an operation mode of the electric motor, and the switch element disposed out of the casing to control switching on or off the control circuit board; 
 wherein the drug-information providing portion has a one-dimensional barcode or a two-dimensional barcode set according to the information corresponding to the drug contained in the injection needle, the electronic reading module is disposed in the casing of the injection propulsion mechanism and has a light source and an image scanning element, the light source and the image scanning element are electrically connected to the control circuit board, the light source emits light on the drug-information providing portion, the image scanning element scans the one-dimensional barcode or two-dimensional barcode of the drug-information providing portion, the microprocessor of the control circuit board determines the kind of the drug by information of scanning the one-dimensional barcode or two-dimensional barcode of the drug-information providing portion and decides to perform a specific injection propulsion action corresponding to the drug. 
 
     
     
       12. The common injection device as claimed in  claim 4 , characterized in that the control assembly further has a display screen and a control module with an operating lever, the display screen and the control module are disposed in the casing and are both electrically connected to the control circuit board, and the display screen and the operating lever are exposed out of the casing. 
     
     
       13. The common injection device as claimed in  claim 6 , characterized in that the control assembly further has a display screen and a control module with an operating lever, the display screen and the control module are disposed in the casing and are both electrically connected to the control circuit board, and the display screen and the operating lever are exposed out of the casing. 
     
     
       14. The common injection device as claimed in  claim 7 , characterized in that the control assembly further has a display screen and a control module with an operating lever, the display screen and the control module are disposed in the casing and are both electrically connected to the control circuit board, and the display screen and the operating lever are exposed out of the casing. 
     
     
       15. The common injection device as claimed in  claim 8 , characterized in that the control assembly further has a display screen and a control module with an operating lever, the display screen and the control module are disposed in the casing and are both electrically connected to the control circuit board, and the display screen and the operating lever are exposed out of the casing. 
     
     
       16. The common injection device as claimed in  claim 9 , characterized in that the control assembly further has a display screen and a control module with an operating lever, the display screen and the control module are disposed in the casing and are both electrically connected to the control circuit board, and the display screen and the operating lever are exposed out of the casing. 
     
     
       17. The common injection device as claimed in  claim 10 , characterized in that the control assembly further has a display screen and a control module with an operating lever, the display screen and the control module are disposed in the casing and are both electrically connected to the control circuit board, and the display screen and the operating lever are exposed out of the casing. 
     
     
       18. The common injection device as claimed in  claim 11 , characterized in that the control assembly further has a display screen and a control module with an operating lever, the display screen and the control module are disposed in the casing and are both electrically connected to the control circuit board, and the display screen and the operating lever are exposed out of the casing.